Movable furnace.



No.'735,712.. PATENTED AUG. 11, 1903. F. E. COOK & W. G. FERGUSON.

MOVABLE FURNACE.

APPLICATION FILED NOV. 11, 1899.

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No. 735,712. PATENTED AUG. 11. 1903,

F. E. COOK & C.-FERG'USON. MOVABLE FURNACE.

APPLICATION FILED NOV.11, 1899.

NO MODEL.

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WITNESSES: INVENTORS I I Att' y.

110. 735,712. PATENTED AUG. 11, 1903.

F. E. COOK & W. (L FERGUSON,

MOVABLE FURNACE.

APPLICATION FILED NOV. 11, 1899.

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UNITED STATES Iatented August 11, 1903.

PATENT OFFICE.

FRANK E. COOK, 'OF WILMERDING, AND WILLI M O. FERGUSON, F PITTSBURG,PENNSYLVANIA, ASSIGNORS TO THE WESTINGHOUSE AIR BRAKE COMPANY, OFPITTSBURG, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

MOVABLE FURNACE.

$PIECIFICATION forming part of Letters Patent #35312, dated August 11,1903. Application filed November 11, 1899. Serial No. 736,708. (Nomodel.)

To all whom it may concern.-

Be it known that we, FRANKE. c ok, residing at Wilmerding, and WILLIAMC. FERGU- SON, residing at Pittsburg, in the county of Allegheny, Stateof Pennsylvania, citizens of the United States, have inventedordiscovered a certain new and useful Improvement in Movable Furnaces, ofwhich improvement the following is a specification.

The object ofour invention is to provide an improvement in movablefurnaces; and it consists in new and improved means for operating amovable furnace whereby it may be lifted, tilted, or lowered, and lockedin any position to which it may be moved.

In the accompanying drawings, which illustrate an application of ourinvention, Figure 1 is a plan view of a movable furnace provided withour improvement; Fig. 2, a ver--' tical section on the line a; w of Fig.1; Fig. 3, a view, partly in elevation and partly in section, lookingfrom the left of Fig. 2; Fig. 4, a vertical section showing the parts inthe positions they will occupy when the furnace has been lifted andtilted far enough to permit the melted metal to begin pouring from thecrucible; Fig. 5,.a vertical section showing the furnace in the positionit will occupy when the crucible is being emptied; F ig. 6, a Viewshowing the tripping-bar turned down and the furnace lifted out of thepit and placed in a vertical position on a truckgand Fig. 7 a section ofthe furnace taken on the line y y ofFig. 4. 7

Our invention is intended for employment with movable furnaces whichoccupy one position when the process ofmelting or reduction is going onwithin the furnace and which are moved to some other position when themetal is to be discharged, and it is specially adapted for employmentwith a furnace in which is placed a crucible containing the metal to bemelted and from which the metal is poured without removing the crucible.

In the drawingswe have shown our improvement applied to abrass-meltingfurnace 30 of the shaft 16.

1, which during the process of melting the metal rests on a box 2, totheinterior of which air under pressure is supplied through a pipe 3.The air-box is located below the level of the ground or floor and issupported by the beams 4 and 5, which form two of the sides of the box.The furnace is formed of a metal casing 6, having a lining of fire-brick7, and is provided at its bottom with a grate the two parts 8 and 9 ofwhich are adapted to swing downward or outward when the pins 10 and 11are withdrawn, as shown in dotted lines in Fig. 3. When the furnaceis inoperation, air from the box 2 passes up through the spaces in the grateand through a mass of fuel surrounding the crucible 12, and the productsof combustion pass off through the opening 13 in the top of the furnace.

On opposite sides of the furnace are proends of two. arms 14 and 15,rigidly secured on ahorizontal shaft 16, and on the opposite side oftheshaft extend arms 17 and 18,which are also rigidly secured to 'theshaft and provided at their free ends with counterbalancing-Weights 19and 20. The arms 14 and 15,

. with the weighted arms .17 and 18, form a pair of levers by which thefurnace is counterbalanced and by which it may be raised or loweredwhenthe shaft; 16 is rotated.

On the end of the shaft 16 is rigidly secured a worm-wheel 21 in acasing 22, and engaging with the teeth of the worm-wheel is a worm 23,the shaft of which is provided with a squared end 24, fitting in asocket on the end 'of a-shaft 25, provided with a hand-wheel 26.

Thehand-wheel and its -shaft are detachable from the shaft of the wormand may be removed when not required for use. A sleeve 27 is looselyfitted on the shaft .16, so that it may be moved longitudinally thereonto be engaged with or disengaged from the bearing As shown in Figl3, oneend of the sleeve 27 is notched or cutaway, so as to forin' a'shoulder28on each side, and these shoulders are engaged with shoulders videdtrunnions,which are fitted in the forked 20 on the bearing 30 when it isdesired to lock the sleeve againstrotation. Projecting from the sleeve27 are arms 32 and 33, between the ends of which is carried abearing-roller 34;, which when the sleeve 27 isin the locked positionstands in the path of the furnace as it is being raised and acts as atilting-stop there for. By shifting the sleeve 27 to the right from theposition shown in Fig. 3 the shoulders 2S and 29 may be disengaged, andthe sleeve is then free to turn on the shaft.

' WVhen it is desired to pour the melted metal from the crucible, thesleeve 27 is placed in the locked position with the arms 32 and 33projecting upward, so as to bring the bearingroller 3% into position toact as a tilting-stop for the furnace. The operator then turns thehand-wheel 26 and through the worm-gear 0perated thereby rotates theshaft 16 and raises the furnace until it is swung by thecounterbalancing-leversintoaposition whereitcomes in contactwith thetilting-stop 34, and as the rotation of the shaft 16 continues thefurnace is automatically tilted by the action of the levers and the stopand the melted metal is poured from the crucible through the spout 35.position which it will occupy at the beginning of the discharge of themetal from the crucible, and in Fig. 5 it is shown in position foremptying the crucible. When in the latter position, the furnace issupported by the lever-arms 14 and 15 and by the tilting-stop and restson top of the tilting-stop with its center of gravity in a vertical linebetween the trunnions and the stop. If it becomes necessary to removethe furnace altogether from its position in connection with the rest ofthe apparatus for the purpose of repairing or for any other reason, thesleeve 27 may he slid along the shaft 16 far enough to unlock it and topermit the stop 34 to be turned down into the position shown in Fig. 6,and the furnace may then by operating the hand-wheel be lifted from theposition shown in Fig. 2 to that shown in Fig. 6 and without beingtilted be landed in a vertical position on a truck 36, by which it maybe removed to some other point. The dotted lines in Fig. 6 indicate theposition of the lever-arm 15 when the trunnion on the side of thefurnace is on the point of leaving the forked end of the lever-arm asthe truck is being moved away.

It will be seen that by means of our improvement the furnace may belifted and tilted and lowered by merely turning the hand-wheel 26, whichmay be operated by a single workman, and the furnace may-be held in anydesired position by the worm-gear, which acts as a locking device toprevent movement except when the hand-wheel is being turned. It will beobvious that the furnace after being raised to any position The furnaceis shown in Fig. 4 in themay be lowered and returned to its original (5dependent of each other and required the employment of several workmen,while with our improvement the lifting and tilting and loweringoperations are all performed by one workman, and the furnace may bemoved to any position within its range of movement and held there aslong as desired.

\Ve claim as our invention and desire to secure by Letters Patent- 1.The combination with a movable furnace and means for lifting the same,of a movable stop and means for adjusting the stop to an operativeposition or to an inoperative position, whereby the furnace may beautomatically tilted while being raised, or may be raised without beingtilted. 2. The combination with a movable furmace and means for liftingthe same, of a movable stop and means for moving the stop either to aposition in the path of the furnace to tilt the same or to a positionwhere it will not be engaged by the furnace in its movement.

3. The combination, with a movable furnace, of a lever for lifting thefurnace, and a stop disconnected from the furnace but with which thefurnace is adapted to engage, whereby when the furnace is being liftedit will also by the same movement be tilted.

4. The combination, with a movable furnace, of a shaft, a worm-wheel onthe shaft, a worm engaging with the worm-wheel and adapted to beoperated to turn the shaft, and means connected with the shaft andfurnace whereby the furnace may be lifted by the rotation of the shaftand a stop adapted to engage the lower end of the furnace to tilt thesame.

5. The combination, with a movable furnace, of a shaft, a worm-gear foroperating the shaft, means interposed between the shaft and the furnacefor lifting and supporting the furnace, and an adjustable stop fortilting the furnace as it is being lifted.

6. The combination, with a movable furnace, of a shaft, means foroperating the shaft to lift the furnace, means extending from the shaftfor supporting and counterbalancing the furnace, and a stop disconnectedfrom the furnace but located in the path of its movement for tilting thefurnace when it is being lifted.

7. The combination, with a movable furnace, of a shaft, supporting-armsfor the furnace, which are secured to the shaft, means forcounterbalancing the weight of the fur-] to engage, whereby the samewill be autonace, a worm-gear for operating the shaft, matically tiltedas it is being lifted. and a stop for tilting the furnace when being Intestimony whereof we have hereunto set lifted, which is loosely mountedon the shaft our hands. 5 and adapted to be shifted so as to permitlift- T ing of the furnace without tilting. 8. The combination with amovablevfurnace having a pivoted arm for lifting and Witnesses: movinglaterally'the' furnace, of an adj ust- GEO. V. MILLIGAN, l0 able stopwith which the furnace is adapted l JAS. B. MACDONALD.

